This 30-Year-Old Pattern Fixes AI Agents

Arcade: One API for all your agent auth: https://arcade.dev.plug.dev/LLbk9in In this video, I show how to apply classic three-tier architecture to agent systems so you can separate concerns across a data source layer (APIs, MCP servers, RAG), a processing layer (reasoning, orchestration, tools, memory), and a presentation layer (Docs, Slack, email, dashboards). I cover what to consider in each layer—freshness, auth, schemas, reliability; model selection, orchestration patterns, context, memory/state, and cost; plus output format, audience, timeliness, multi-channel delivery, and human-in-the-…